In general terms it is the narrowing of the spinal cord and the resultant compression of the Sciatic Nerve that causes spinal stenosis. The most common cause is a gradual, degenerative process that can be triggered by structural changes or inflammation. Advancing age, in certain cases leads to the thickening of the ligaments or calcification (hardening caused by calcium deposits). Bones and joints may enlarge and project out from the body. The projections, called spurs, compress the Sciatic Nerve roots and cause Sciatica.
Spinal stenosis is also one of the most common indications for surgery in individuals above 60. Surgery does not stem the degeneration and is effective only for the degeneration that has already occurred. More degeneration after surgery results in recurrence and this can happen as early as seven years after the operation.
Spinal stenosis is an unfortunate condition that can neither be predicted nor prevented. There are some acquired causes of spinal stenosis that are not connected with the natural process of degeneration. These may include a tumor of the spine, dislocation of the spine due to a trauma and excessive levels of fluoride and calcification of soft tissue into a bonelike material due to calcium deposits.
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